Mild and applicable synthesis of mono-, bis-, and spiro- perimidines is demonstrated in high yields via the condensation of 1,8-diaminonaphthalene and aldehydes or ketones in the presence of sulfamic acid as a green and highly efficient catalyst. This environmentally benign and clean synthetic pathway offers several advantages, such as high yields, short reaction times and easy work-up procedure.

Superprotonic conductivity, utilizing MOFs embedded with a moderately acidic guest—zwitterionic sulfamic acid (HSA)—was demonstrated by Myoung Soo Lah et al. in their Research Article (e202302376). HSA not only acted as proton source, but also proton-conducting medium. The MOFs, which had been filled high quantities of using sustained concentration gradient method, exhibited impressive superpro...

Fe(3)O(4) nanoparticles were prepared by chemical coprecipitation method and subsequently coated with 3-aminopropyltriethoxysilane (APTES) via silanization reaction. Grafting of chlorosulfuric acid on the amino-functionalized Fe(3)O(4) nanoparticles afforded sulfamic acid-functionalized magnetic nanoparticles (SA-MNPs). SA-MNPs was found to be a mild and effective solid acid catalyst for the ef...

Silica-bonded N-propyldiethylenetriamine (7) is employed as a recyclable heterogeneous solid base catalyst for the synthesis of 2-amino-3,5-dicarbonitrile-6-thiopyridines through pseudo four-component condensation reaction between aromatic aldehydes, malononitrile, and 2-amino-thiophenol in refluxing ethanol. Silica-bonded N-propyldiethylenetriamine showed much the same efficiency when used in ...

PS 403‐17 Sampling and Analysis of Airborne Trichloramine in Indoor Swimming Pools T. Chu, S. Tsai, National Taiwan University, Taipei, Taiwan; S. Cheng, Council of Labor Affairs, Executive Yuan, Taipei, Taiwan. Objective: In swimming pools, visitors can contribute various kinds of organic nitrogen, such as sweat, or skin particles, which would react with chlorine to form trichloramine. It has...

The coproduction of 5-hydroxymethylfurfural (5-HMF) and furfural (FUR) via the direct hydrolysis holocellulose analogue composed cellulose hemicellulose was investigated. effects catalyst amount, solvent type reaction temperature time using sulfamic acid with dual active sites as were also studied. yields 5-HMF FUR at 37.2% 62.0% obtained volume ratio γ-valerolactone to water 25:1 180 °C for 3 ...